Hyung means older brother- only mal

Hyung means older brother- only males use this term. Oppa means older brother, except only females use this term. Noona means older sister and again, males use this term. Unnie means older sister and only females use it. It can get confusing..lol Oh and same goes for this, they don't have to be related to call each other that.. just as long as the age fits, you can pretty much call anyone those - not just siblings.